Cessna Service Letter Se79 49 [hot] Direct

Service Letter SE79-49 falls into the latter category, but its subject matter—flight control integrity—elevates its importance in the eyes of conscientious mechanics and owners.

In the world of general aviation, few aircraft have achieved the legendary status of the Cessna 172 Skyhawk and the Cessna 180/185 Skywagon. These aircraft are the workhorses of the sky, renowned for their durability and forgiving flight characteristics. However, owning and maintaining a legacy fleet requires a deep understanding of the specific Service Letters and Service Bulletins that keep them airworthy. Cessna Service Letter Se79 49

The Service Letter advises mechanics to inspect these critical bolts during annual inspections or at specific hourly intervals. It provides guidelines on how to measure wear and specifies when a bolt must be replaced versus when it is still serviceable. Service Letter SE79-49 falls into the latter category,

| Mistake | Consequence | Correction | |---------|-------------|------------| | Using old nut (75024) | AD non-compliance, risk of loosening | Replace with 61A20 | | Torque <120 in-lb | Insufficient preload | Retorque to 135 | | No safety wire | Not airworthy – violation of FAR 43.13 | Add wire | | Damaged governor drive splines | Nut may loosen despite torque | Replace drive gear (requires engine teardown) | | Missing gasket | Oil leak at governor pad | Install new gasket | However, owning and maintaining a legacy fleet requires

Cessna Service Letter SE79-49 and its revision, R1, mandate 100-hour recurring inspections for vertical fin attachment nutplates on specific Cessna 150 and 152 models, forming the basis for AD 80-11-04 to prevent tail structural failure. The service letter requires inspections of eight NAS 1068A4 nutplates, with immediate replacement needed upon finding cracks. Read the details at Cessna 150-152 Club cessna150152club.org AD 80-11-04 Cracked Nutplates - Cessna 150-152 Club